激光/红外共光路无热化光学系统设计  

Laser/Infrared Optical System Design of Common Optical Path and Athermalization

作　　者：周子楠[1] 马军[2] 尉佩[1] 蓝岚[1] 王文生[1] 

机构地区：[1]长春理工大学现代光学测试技术研究室,吉林长春130022 [2]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《激光与光电子学进展》2015年第1期179-185,共7页Laser & Optoelectronics Progress

摘　　要：基于激光测距和红外目标探测需求,设计了激光/红外共光路无热化光学系统。根据用户要求,系统参数设计如下：焦距为150 mm,F数为2,工作波段为1.57μm和3~5μm。1.57μm激光波长选用RS-RTM-31243-001-C1型In Ga As光电探测器;3~5μm红外波段选用ULIS公司的2/3 inch（1 inch=2.54 cm）红外探测器,对应全视场为4.2°。像质评价结果表明,在温度-50℃~70℃范围内,1.57μm激光波长各视场点列图均方根半径最大为8.166μm,远小于探测器有效接收半径75μm,能量集中度高;在截止频率15 lp/mm处,3~5μm红外波段各视场调制传递函数（MTF）均在0.78以上,接近衍射受限曲线,像质优良,结构简单,满足用户提出的总体设计要求。Based on requirements of infrared target detection and laser ranging, laser/infrared optical system with common optical path and athermalization is designed. According to user requirements, the parameters of the optical system are defined as： the focal length is 150 mm, the F number is 2, the operating waveband covers 1.57μm and 3-5μm. A RS-RTM-31243-001-C1 InGaAs photoelectric detector is selected for 1.57 μm laser wavelength; and a 2/3 inch （1 inch=2.54 cm） detector of ULIS company is selected for 3-5 μm waveband （the full field of view is 4.2°）. The evaluation results of image quality show that, in temperature range of -50℃-70℃, maximum value of root mean square （RMS） radius of the spot diagram at each field of view is 8.166μm, which is far less than the effective receive radius of detector （75 μm） and the energy concentration is very high at 1.57μm laser wavelength; at cut-off frequency of 15 lp/mm, modulation transfer function （MTF） of the 3-5 μm infrared waveband are all above 0.78 for each field of view, which is closed to the diffraction-limited curve. So the system has good image quality, simple structure, and meets the user requirements of the optical overall design.

关 键 词：光学设计 激光测距 红外成像 共光路 无热化 调制传递函数 

分 类 号：TN216[电子电信—物理电子学]